[Announcement] collordiff and lesspipe

http://chakra-project.org –
colordiffA tool to colorize diff outputlesspipeAn input filter for the pager less. It allows you to view files with binary content, compressed files, archives and files contained in archives. A large and growing number of formats are supported both as plain and compressed files using compress, gzip, bzip2, lzma, lzip or zip.
(HowTos)

I have two tar archives (compressed or not compressed), and I want to find all differences in the two archives. Both archives contain a complete file system (i.e. when unpacked, would generate directories like /bin, /home, /root, /usr, /var, /etc,... I hope you get the point).